Microwave oven rack



FIG. 1 is a perspective top view of the microwave oven rack, showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side elevated view thereof; and

FIG. 4 is a partly exploded, bottom perspective view of my new design. 

The ornamental design for a microwave oven rack, as shown and described. 